Anyone who intervenes in the kitchen with their unwanted opinion whilst one is trying to cook their dish. This also includes but is not excluded to the taking over of cooking duties and or sabotaging an already perfect dish by secretly adding their own shitty ingredients

Girl: Man what is that guy in Ratatouille doing to that already perfect soup dish?
Guy: He's totally a cookblocker; look at what he's doing to the soup with those shitty herbs.
Girl: Who would do such a thing?
Guy: Idk, he's like a ginger.
Girl: Point made.